Heater for dynamite or other explosives.



H2B. P. KELLY. A HETBR PoR nYNAMITLLoyo-THVBR xpmms.-

APPLICATION FILED sur. e, 19o?.

PATETED AUG. 4, 1 908. v

@ms PATENT' Ornor;

`BENJAMIN F..KELLY, or. saLT LAKE Grrr, Uran.

To all whomit may concern.'

Be it knoyvn that I, BENJAMIN F. KELLY, a citizen of the United States,residing at Salt Lake'City,county of- Salt Lake, and State of Utah, haveinvented certain new and useful Improvements in Heaters for Dynamite orother Explosives, of which the following is a specification.

My invention relates to means for heating sticks of dynamite,nitro-glycerin and other V.high explosives, and it consists essentiallyin a casing having therein a removable hot 'Water container entirelyclosed from 'communi-- cation with the interior of the casing and a rackwithin the container so arranged in compartments as to hold sticks ofexplosive, but

permitting a circulation of Warm air in coni -tact with the sticksand'entirely around the dynamite for blasting l in situationshwhereproper appliances can be had consists in heatmg'by/means of a steam.

coil. I-I'ere not only is the heat liable to become excessive but thecontrivances demand an amount oiapparatus not consistent with Vthe rudeconditions under whieh'these ex plcsives are ordinarily used.

My invention has for its object the heating of dynamite in an extremelysimple manner and by means of a heater which While thor- .oughlyeffective cannot lpossibly 'act to overvheat the dynamite' but in'which'.the heat while'primaiy ample for the dpurpose and continued forasv long a perio as desired, graduallydecreases and .cannot by any pos-'sibilityriseabove the danger point; an appa ratus so .arranged that theheat will come in direct contaetvith ythe sticks and yet so arranged. asto hold each stick separate from the others and absolutel preventing.the

of the sticks .to et r andhence the Specication of Lettera Patent., iApplication filed September 6, Seallio. {SAS-1,557. u l` V v .charactersdesignate like parts.

-sire 'without departing from the spirit of my' ,whereby the casing maybe carried,'the

distribution of at; thus -rna an;

AHEATER FonpYNsMITE ORoT-BER-XPLOSIVES.

in the hands of the most ignorant.

In additionfto `these minor objects of my invention, it consists inmaking a heater and container for dynamite sticks which may be veryeasily handed Patented aug. 4,1908. Y

apparatus xyhich is absolutely harmless.evenl l 30. can be carried from'place to place and which will also provide ar' means for holdingpurtenances. In the drawings, wherein I have shown an F Lusses, c apsand other ap-` erspective view. of theiheati casing, the ont of said.casing being bro en,away to show the heater, rack and cover. \I \`ig. 2is a front elevation of the rack. Fig. 3 is an end elevation of a rack.Fig. 4 is`a front elevation of a modified iorm of casing.`\\". iv

Throughout the.4 figures like ."re\erence A designates a casing of Wood,metal or composition, preferably rectangular infsliape for the insertionof a rac h haveV shown the casing A as open'at the be understood,however, that I may form the casing in any desired manner if I so de#invention. y

. Closing the open end of the casing A is the cover C, said cover asshown in Fi 1 being embodiment of my inventiomFlgure 1 1s a with oneside open or adapted to be opened B. -In Fig.

and as formed of a single thickness of me .lined with non-conduc tingmaterial. v

formed with a chamber c below 1t for the l holding of fuses and other'devices to be used in the o eration of blasting. The cover is provider`With .a handle C and its'edge, when projects over the upper thepcoveris in place, ed e of the casi A. designates a pivoted bail or handle eaging at its lower end in ears a.

n Fig; 4 I have shown a 'modification of'- the casing, in which thecasing is provided with a door A2 in place of the cover C, th1s doorbeingl hhged to one side of the casing A The door isprovided withlatches a,2 whereb it 'may be closed and has also an ear a,3 Whic may beengaged by the bail A.' In this construction it Will be seen that thebail cannot Y n:

105, venting any possibility. ot the door let open and thus-allowing thefalling out of* be applied until the door is closed, thusprethecart-ridges.

B designates ,thel dynamite rack.Y -t l'As I A.- have shown-it, itlconsists o f a wire or metal 1Q frame referably of -metal rods andheavy Wire, t e fra-nie consisting of the U-shaped cud rods 7J connectedat suitable distances by 'cross rods b', and the cross diagonal rods ori" wires b. The` spaces between eachtwo of would serve to support thecenter of thecartridge. I have shown suchf a third frame in the end viewFig. 3; .Th top of the' rack is provided with a bail or handle B wherebythe rack can be conveniently carried. The lower portion of therods bextends downward to form the legs b supporting the main portion 4of therack'vsome distance above the bottom'of the casing.

,Ada ted to rest upon' the loor of the casing is t e hot water containeror heater D of any. suitable desired form. I have shown it asa metallicvessel slightly smaller than 'the interior of the casi A and supportedabove'the main floor of t e casing by transverse corrugations Alon thebottom of the casing. The container is rovided with a go'filling ppeningd covered by a cap. The heater being supported uponthe corrugations A3and bein narrower .than the width of the casing A, tIie heat from allsides of it will pass upward into the upper portion of the casing. Itwill be understood, however,

that I do not wishto be limited to this form of heater as the same maybe of any desired shape and made of any material consistent wit itscontaining hot water. 40 In the construction shown in Fig. 4, the top Cof the casing is not removable as it is in Fig. 1, but the top and thechamber c are permanently supported in place above' the rack. The doorA2 securely closes the side opening of this compartment.

In operation theheater D is lled with boiling water. The dynamite sticksareL laced one in each ofthe spaces formed y the crossed wires and therack placed within the casing. The casing is then closed and left-.untilit is desired to use the. dynamite. It may .be easily transported by theminer from place to place, the dynamite keeping at the proper heat asthe radiation frim the hot water container" is comparatively slight. Aheater of tliecapacity of one gallon will heat about 50 sticks ofAdynamite or-giant the reason that vthe heat is very gradual and slowand can never rise above a Certain limit; that is, above thetemperatin'e. of boiling waterv or any lower temperature than that atwhickuthe water is p aced in the container. The heater must be heatedowder inabout twoehours.- There is no? anger in thisoperation for Thisis avery im ortant point as it prevents the contents of the casing. yAsthe contsiner 1s'. not connected with any source of steam supply, theheat cannot increase within the casing. The heat simply continnes overa' considerable period and'gets gradually less. Tlius'there is no dangerof ,the temperature beyond a proper I have found by'v experience] thatthe enr-y of ignorant workmen to lay dynamire sticks in a hea or toplace them in to prevent theheat coming iii contact with cartridges aresplaced as to comein contset with each other, they not only prevent theheat rising and being equally distribui ted throughout the casino', butadjacent This is a frequent cause of accidents. v By'reasonv oi' thepeculiar construction of o pow erfin' contact' with each other.- Theyare bound to be separated and a space le't around each stick'for theupward passage ofV the heat." In addition to this the o rack maybeeasily cleaned to prevent any excretion of glycerin upon it. AThisability to thoroughly cleanse the su ports for the, dyxawmite' sticks isofl consi erable impor- `mince necessary'to support it and that surfaceshould be entirely open to observation and to cleansing.;

very easily washed, dipped into hot water and otherwise cleaned. Thecompartment at the top of the casing is of considerable value as a meansof kee ing and' holding the necessary' fuses and condition for reliableoperation at all times.

eiaimis:

easing,-having an opening onone side, a cover for said opening, a bailon said casing trainer removable from the casing but indethe bottomthereof, and a rackfor'supporting ex losive inde endent of the casing'orrari; consisting of vertical frames provided l diagonally crossed barsbetween which supported.

away from the casing and `then inserted.'

hotwater supply or with any source of.

Amattei' to be guarded against is the tend' Contact with each ot er insuclimanner as A' cartridges are liable to sticli to each other.

tance in .the practical operation of .the appar The dynamite should comein con-. tact with only the minimum amount of It will be obvious'that myrack may eeping them in pendent of the same adapted to be located in Aheater for dynamite `comprising aA smg having an opening on the upperside, a

env contact of ire or extraneous heat with my rack( it is impossible toplace two sticks I aving described my invention what I for lifting thesaine, a 'closed hot water con- 'fthe sticks of-explosive are adapted tobe i in provided with a c amber on. its

t gsi e adapted to'contain material to be hem- "ged, thev walls. ofsaidl `chamber extending downward and iitting against the walls of tine-casing, a bail on said casing for lifting' tine same, a'rack forsupporting th?l explosives,

\sai`d rack consistin of vertical frames pmovided with diagonaly-crossed bars between which the sticks of explosive areadapted to' besupported, the rack being provided at [u per end with a bail whe:eby itmay be li ted, and on its under side with legs adapted to rest lipon thebottom of the casing when the rack is in place, and a closed hot Watercontainer removable from the' casing hist adapted to be located in thebottom thereef between the' legs of said rack and' beneath dynamitesupporting portion thereof.

3. A heater for dynamite comprising a' casing having an opening on the uer side; a cover fitting into said o ening, sal cover he; inprovided'with a c amber on its si e adaptedtoeontain material to behesited; a handle on lslaidfcfising for lifting the 2s same; a rack forsupporting explosives, said 'rack'consisting of Ushaped verticalfsidepieces suitably spaced from each other, each side pieeelbeing providedwith diagonally crossed bars' .upon which the sticks of explosive areadapted to be supported out of contact with each other, said rack beingprovided at its upper end with a bail whereb vit may be lifted and atits under side with egs adapted to restu on the bottom of the casingwhen the mail is in place; and a closed hot Water containerremovable-from the cas' n ig but adapted to be located in the bottomthereof beneath the. dynamite supporting portion of the rack. 43

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnees.

BENJAMIN F. KELLY.

